On Fri 22-05-15 20:30:42, Oleg Nesterov wrote: > On 05/22, Michal Hocko wrote: > > > > On Fri 22-05-15 18:29:00, Oleg Nesterov wrote: > > > > > > In the likely case (if CLONE_VM without CLONE_THREAD was not used) the > > > last for_each_process() in mm_update_next_owner() will find another thread > > > from the same group. > > > > My understanding was that for_each_process will iterate only over > > processes (represented by the thread group leaders). > > Yes. But note the inner for_each_thread() loop. And note that we > we need this loop exactly because the leader can be zombie. I was too vague, sorry about that. What I meant was that for_each_process would pick up a group leader and the inner for_each_thread will return it as the first element in the list. As the leader waits for other threads then it should stay on the thread_node list as well. But I might be easily wrong here because the whole thing is really quite confusing to be honest. -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>